将下面代码排列成正确格式 org 0x7c00start: mov ax, cs mov ds, ax mov es, ax ; 清屏 xor ax, ax mov es, ax mov di, 0 mov cx, 80 * 25 mov ax, 0x0720 rep stosw ; 输出字符串 mov si, str mov ah, 0x0eprint: lodsb cmp al, 0 je_sum int 0x10 jmp print ; 计算ASCII值的总和calc_sum: mov si, str xor cx, cxsum_loop: lodsb cmp al, 0 je end add cx, ax jmp sum_loop ; 显示ASCII值的总和end: mov ax, cx mov bx, 10 xor cx, cx div bx push ax cmp ax, 0 jz print_sum jmp endprint_sum: pop ax add al, '0' mov ah, 0x0e int 0x10 jmp endstr db "21210929周何昊然", 0times 510-($-$$) db 0dw 0xaa55```

org 0x7c00
start:
    mov ax, cs
    mov ds, ax
    mov es, ax
    
    ; 清屏
    xor ax, ax
    mov es, ax
    mov di, 0
    mov cx, 80 * 25
    mov ax, 0x0720
    rep stosw
    
    ; 输出字符串
    mov si, str
    mov ah, 0x0e
print:     
    lodsb
    cmp al, 0
    je end
    int 0x10
    jmp print
    
    ; 计算ASCII值的总和
calc_sum:     
    mov si, str
    xor cx, cx
sum_loop:     
    lodsb
    cmp al, 0
    je end
    add cx, ax
    jmp sum_loop
    
    ; 显示ASCII值的总和
end:     
    mov ax, cx
    mov bx, 10
    xor cx, cx
    div bx
    push ax
    cmp ax, 0
    jz print_sum
    jmp end
    
print_sum:     
    pop ax
    add al, '0' 
    mov ah, 0x0e
    int 0x10
    jmp end
    
str db "21210929周何昊然", 0
times 510-($-$$) db 0
dw 0xaa55